Evaluate the equation for the given variable

What is the value of y, when x = 3 and y = 5 + 4x?

y = 5 + 4x
y = 5 + 4(3)   {substituted 3, in for x, into the equation}
y = 5 + 12   {multiplied 4 by 3}
y = 17   {added}

- Algebra House